Correct. Spend a little up front, and you'll usually end up with a better product. All the more so if you check on "reports from the field" before laying down YOUR cash!
HIDs don't require so much a wiring upgrade (which IS needed if you go with something brighter!) but a wiring modification - with the installation of ballasts units and such. They'll work off stock wiring, but you'll still have to install a few things. Incandescent bulbs are usually advertised by the "fill gas" - nothing, or a hard vacuum; halogen gas of some variety (I'm not sure which
xenon/krypton (inert, "noble" gasses) being the most common.
If you want "bloo" lights, I won't try too hard to discourage you, but know a couple things...
1) I almost invariably see these badly aimed. Probably why they crank me off so much.
2) They're a knock-off of the HID look, which is why they're blue. They're also bluer than HID, which makes them less efficient illuminators (blue is not an effective colour for primary illumination.)
3) They'll glare a bit more in fog, snow, and rain.
4) A blue or bluish light is not going to give as effective illumination as a white light, or even a yellow light. White light does not "change colours" due to different absorption/reflection rates, and yellow has minimal effect in the tints used. I'd sooner go with yellow than blue - yellow also has the beneficial effect of not glaring as badly in rain/snow/fog (which is why fog lights are also pale yellow.) Still, white is definitely my first choice.
5) If you upgrade your lighting in pretty much any way above stock, you'll want to check their aim, or just re-aim them. I've posted useful instructions on how to do this with lighting upgrades (HINT - it's not "dead ahead!") here a few times, and a search should turn up those instructions until I get them written up as a FAQ (since I seem to get asked once or twice a month.)
Like I said - if you want "bloo" lights, go ahead. I won't try to dissuade you based upon my personal bias, but you do have facts listed above on the realistic reasons why I won't use "bloo" lights, so do please consider those as well.
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